Sash lock



Gyw. nEEns.

SASH LOCK.

APPLICATION FILED OCT. 2I, i920.

Patented J une 6, 1922,

A 7 form/u UNITED STATES GEORGE W. DEEDSfOF jPI-IILADELPHIA, PENNSYLVANIA.

SASH LOCK.

Specification of Letters Patent. Patented June 6, 1922- Application filed October 21, 1920. SerialgNo. '4l-8,554.

To all whom z'fmag/ concern:

Be it knownthat I, Grao-Ren WV. Dnnns, a citizen of `the United States, residing at the city of Philadelphia, county yof Philadelphia, and State of Pennsylvania, have 1nvented a certain new and useful Improved Sash Lock, of which the following is a specification. v

This invention has relation rto window sash, sliding gates, doors and :the like which may be locked upon ythe inside, while closed or in any one of a number vof partly open positions, to prevent unlocking from the outside.

The leading object of the present invention is to provide a lock to be employed in this respect which `is simple, practical, efficient and comparatively inexpensive to manufacture and which can only be unlocked by means of a removable key insertible from one side of the lock casing. Other and further objects relate to the provision of general details of construction and in the novel arrangement, connection and combination of parts as will hereinafter appear.

The invention consists o-f the improvements hereinafter described and finally claimed.

The nature, characteristic features and scope of the invention will be more fully understood from the following description taken in connection withthe accompanying drawings forming part hereof, and in which:

Fig. 1, is a fragmentary view in front elevation of a window sash equipped with a lock embodying features of the invention.

Fig. 2, is a view in side elevation thereof.

Fig. 3, is a view in front elevation of the lock detached, the cover plate being removed for the sake of clearness.

Fig. 4, is a view thereof in cross-section.

Fig. 5, is a detached view in elevation of the longitudinally shiftable bolt shown in Figs. 3 and 4, and

Fig. 6, is a similar view of the vertically shiftable detent shown in Figs. 3 and 4.

For the purpose of illustrating my invention I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to-give satisfactory and reliable results, although it is tobe understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise scribe-d.

arrangement and organization of thein-y n strumenta-llties yas herein shown and de- Fornthe sake of illustration I haveshown the vlock applied to window-sash although obviously the same is applicable to vsliding gates, doors and ,the like.

Inthepreferred form shown, 10 designates ai casing `havinga removable cover 11 secured tothe .open side of said casing. The

closed side of thecasing .is presented forinystance to -the lower sash :frame 12o-f a win- -vertically slotted as at 18 to permit such movement of said plates. Plate 14 is interlocked with respect to plate 15 at thel extreme shifted positions thereof. For this purpose a lug 19 extends laterally from the rear face of plate 14 and is adapted to engage one or the other of the notches 20-21 of slot 22 in plate 15. A leaf spring 23 interposed between the casing top and the upper faces of said plates serves to normally maintain said plates in proper position` The under faces of plates 14M15 are out away as at 24 and 25 respectively so that when a conventional key (indicated by dash-lines in Fig. 3) is inserted through key-hole 26 in the casing cover and moved toward the right in Fig. 3, sai-d key engages the cut-away surface 25 of plate 15, lifts the latter against spring 23 thereby causing lug 19 to be disengaged from notch 2O so that slot 22 comes into alignment with said lug. Further movement of the key causes it to impinge against the underside of plate 14 and shift it towardy the right in said figure so that the notched end 27 thereof enters the groove 28 of al sash frame. The detent 29 is provided withr a knob 31 so that it may be readily disengaged from a socket 30 when the plate 14 is in the position shown in Fig. 3. The plate 14 is shifted to such position by inserting a key in said casing and vmoving the saine to- Wardthe left in said figure. The detent 29 interlocks the sash frame and the latter is-detained by plate 14. Since plate 14 can only be shifted by a conventional key insertible in casing 10 obviously itis impossible' for an unauthorized person to open said Windowsash either from the inside or outside.

' It Will now be apparent that 'havede- Vised a novel and useful construction Which embodies the features of advantage enumerated as desirable in the statement of the invention and thefabove description and While I have in the present instance shown and described the preferred embodiment thereof which has been foundv inpractice to give satisfactory and reliable results, it is tobe understood that the saine yis susceptible of modification in various particulars Without departing from the spirit or scope of the lsigned] my name.

invention or sacrificing any of its ad vantages. Y

,What I claim is: y I A. lock comprising a housin` parallel --plates slidably mounted therein of which one is longitudinally 'movable and the other vertically movable, the under faces of said plates being cut-away, a transversely mounted them, 'means arranged Abetween said plates for interlocking them and a spring interposed between the top of the vertically movable plateand the top of said housing for normally maintaining said pilates in the same horizontal plane.

ln testimony (whereof, I have hereunto GEORGE W. Danos. 

